Salifert Profi Test Kits for reef, marine and advanced freshwater aquarists are some of the most precise and accurate test kits on the market. Kits are available for all aspects of the aquarium’s chemistry, covering organic and inorganic pollutants as well as valuable marine trace elements to allow for accurate dosing when additives are required. The kits feature bold colour changes and good colour comparison charts and offer quick and easy water testing. There are 16 kits in the range, and most are suitable for both freshwater and saltwater environments (unless otherwise stated). Nitrate Profi-Test: * When there are insufficient areas of a tank which are deprived of oxygen (anaerobic zones) or denitrification is not taking place properly, nitrate will build up. This can also happen in an aquarium where the biological loading on the system is causing an imbalance e.g. is there is excessive livestock for the aquarium volume or over feeding is occurring. * The build up of nitrate can result in unwanted algae growth and the slowing down of coral growth. * The nitrate concentration in a reef aquarium should be lower than 1 mg/L, although fish only aquariums would usually have a higher concentration. * Just as with nitrite, many nitrate test kits are prone to amine interference which can make the levels of nitrate appear much lower than they actually are. * The Salifert test kit does not suffer from such interference and gives accurate and quick results with a total testing time of less than 3 minutes. * The test kit’s range goes from a very low to a very high nitrate concentration (approx. 0.2 – 100 mg/L as total nitrate). * Sufficient for 50 tests.